<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>while循环打印奇数</title>
</head>
<body>
    <script>
        var num = 0;
        while(num<=100){
            if( num&2 != 0 ){
                document.write(num + '&nbsp');
            }
            num++;
        }
    </script>
</body>
</html>